Active clearance control for gas turbine engine

Abstract

An active clearance control assembly for a gas turbine engine includes a firewall, a fluid intake and an active clearance control manifold. A conduit is configured to direct a fluid from the fluid intake on a first axial side of the firewall through the firewall to at least one active clearance control manifold on a second axial side of the firewall. A valve is located on the first axial side of the firewall and is configured to regulate the flow of the fluid through the conduit.

The invention claimed is: 
     
       1. An active clearance control assembly for a gas turbine engine comprising:
 a firewall; 
 a fluid intake; 
 an active clearance control manifold; 
 a conduit configured to direct a fluid from the fluid intake on a first axial side of the firewall through the firewall to at least one active clearance control manifold on a second axial side of the firewall; and 
 a valve located on the first axial side of the firewall configured to regulate the flow of the fluid through the conduit. 
 
     
     
       2. The assembly of  claim 1 , wherein the firewall is configured to be located upstream of a combustor section. 
     
     
       3. The assembly of  claim 2 , wherein the active clearance control manifold is configured to surround a turbine case enclosing a high pressure turbine and a low pressure turbine. 
     
     
       4. The assembly of  claim 3 , wherein the fluid intake is configured to be flush along an inner nacelle. 
     
     
       5. The assembly of  claim 4 , wherein the fluid intake includes a generally elliptical opening. 
     
     
       6. The assembly of  claim 3 , wherein the fluid intake is configured to extend into an inner nacelle flow path. 
     
     
       7. The assembly of  claim 1 , wherein the firewall includes a receptacle for accepting a d-door. 
     
     
       8. The assembly of  claim 3 , wherein the conduit is in fluid communication with a first manifold surrounding the high pressure turbine and a second manifold surrounding the low pressure turbine. 
     
     
       9. The assembly of  claim 8 , wherein a first manifold of the at least one active clearance control manifold is configured to direct the fluid at an outside surface of the high pressure turbine. 
     
     
       10. The assembly of  claim 9 , wherein a second manifold of at least one active clearance control manifold is configured to direct the fluid at an outside surface of the low pressure turbine. 
     
     
       11. The assembly of  claim 10 , wherein the conduit includes a first branch in fluid communication with the first manifold and a second branch in fluid communication with the second manifold. 
     
     
       12. The assembly of  claim 11 , wherein the first branch is located axially upstream of the low pressure turbine. 
     
     
       13. The assembly of  claim 1 , wherein the firewall includes an environmental control system (ECS) manifold located on a downstream side of the firewall and the ECS manifold is in fluid communication with an ESC module. 
     
     
       14. The assembly of  claim 13 , wherein the firewall includes a nacelle ventilation manifold on a downstream side of the firewall and the nacelle ventilation manifold is in fluid communication with the nacelle.